I have two of the older ones and the trigger pull takes all day with minimum sights. My wife just bought a new one and the trigger pull is half the older models and the sights you can really see. The new models don't have a dash in the serial numbers either. I want to know if there is any way to send the older models back to Ruger to be retrofitted with the new firing system. I guess I'll have to call thech support to get a clear answer. I sent an email and got a vague answer on the subject.